when i was trying build bcı2000 source code zip file visual studio giving me LNK2001, LNK2019, MSB6006, MSB3073, LNK1120, LNK4098 error ı can't find what is wrong because ı made everything just like building page it is giving me error .It is not just that it is also giving me authentication error and when ı try update svn it telling me bcı2000 locked it is not update or download the files.

1st: Do a new SVN Pull using the following link http://www.bci2000.org/svn/trunk <---there are two links on wiki, use this one not the other
2nd: Once you link Qt and configure the files go to USE and disable USE_APPLICATION_BUNDLES.
3rd: Go to Build > Configuration Manager > Deselect BCI2000 Viewer in both Release and Debug Mode.

The BCI2000 Viewer causes one of your errors, You can deselect it so VS does not attempt to build it. Those three steps should eliminate most of the errors you are receiving.